Be extremely careful in your terminology and thus what you ask for:

1. You can't "remove" or "delete" anything. You may or may not be able to change your ticket.
2. If your transfer time is <24 hours, you have a connection.
3. 24+ hours, it is a stopover.

I would call your TA and determine whether there is any cost for doing what you seek to do and, if there is a cost, how much that cost might be. Not all changes are as expensive as people sometimes think they will be, so it is always worth asking. Just make certain that you explain in detail exactly what you want and instruct the TA not to do anything until you have the facts in front of you and have made a decision.